package cn.source.common.utils;

import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDate;
import java.time.Period;
import java.time.ZoneId;
import java.time.temporal.ChronoUnit;
import java.util.Calendar;
import java.util.Date;

/**
 * 时间工具类
 *
 * @author ruoyi
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String MM_DD = "MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"
    };

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    /**
     * 获取昨天日期, 默认格式为yyyy-MM-dd 字符串
     *
     * @return String
     */
    public static String getPreViewDateStr() {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DAY_OF_MONTH, -1);
        Date preViewDay = cal.getTime(); // 这是昨天
        return parseDateToStr(YYYY_MM_DD, preViewDay);
    }

    /**
     * 获取昨天日期, 默认格式为yyyy-MM-dd Date日期
     *
     * @return String
     */
    public static Date getPreViewDate() {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DAY_OF_MONTH, -1);
        Date preViewDay = cal.getTime(); // 这是昨天
        return preViewDay;
    }

    /**
     * 获取i天前的日期, 格式为MM-dd 字符串
     *
     * @return String
     */
    public static String getPreViewDateStrByNum(int i) {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DAY_OF_MONTH, -i);
        Date preViewDay = cal.getTime(); // 这是昨天
        return parseDateToStr(MM_DD, preViewDay);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 格式化时间
     *
     * @param date
     * @param format
     * @return
     */
    public static String dateFormat(String date, String format) {
        SimpleDateFormat sformat = new SimpleDateFormat(format);
        Date _date = null;
        try {
            _date = sformat.parse(date);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return sformat.format(_date);
    }

    /**
     * 格式化时间(默认格式)
     *
     * @param date
     * @return
     */
    public static String dateFormat(Date date) {
        if (StringUtils.isNull(date)) {
            return "";
        }
        return new SimpleDateFormat(YYYY_MM_DD).format(date);
    }

    /**
     * 计算两个日期的间隔天数
     */
    public static Integer diffDateDay(Date startDate, Date stoptDate) {
        LocalDate startLocalDate = startDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
        LocalDate endLocalDate = stoptDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
        return (int) ChronoUnit.DAYS.between(startLocalDate, endLocalDate);
    }

    /**
     * 计算两个日期的间隔月数
     */
    public static Integer diffDateMonth(Date startDate, Date stoptDate) {
        Instant startInstant = startDate.toInstant();
        Instant stopInstant = stoptDate.toInstant();
        ZoneId zoneId = ZoneId.systemDefault();
        LocalDate date1 = startInstant.atZone(zoneId).toLocalDate();
        LocalDate date2 = stopInstant.atZone(zoneId).toLocalDate();
        Period period = Period.between(date1, date2);
        int totalMonths = period.getYears() * 12 + period.getMonths() + 1;
        return totalMonths;
    }

    /**
     * 获取几个月以后的日期
     */
    public static Date nextDateMonth(Date startDate, Integer month) {
        Instant startInstant = startDate.toInstant();
        ZoneId zoneId = ZoneId.systemDefault();
        LocalDate date = startInstant.atZone(zoneId).toLocalDate();
        LocalDate plusSix = date.plusMonths(month);
        return Date.from(plusSix.atStartOfDay().atZone(zoneId).toInstant());
    }

    public static void main(String[] args) {
        Date date1 = DateUtils.nextDateMonth(new Date(), 2);
        Date date2 = DateUtils.nextDateMonth(new Date(), 1);
        if (dateFormat(date1).compareTo(dateFormat(date2)) <= 0) {
            System.out.println("小于等于");
        } else {
            System.out.println("大于");
        }
        System.out.println(diffDateDay(date1, date2));
    }
}
